class Settings():
    """存储《外星人入侵》的所有设置的类"""
    def __init__(self):
        """初始化游戏的静态设置"""         
        
        self.screen_width = 1000         
        self.screen_height = 600         
        self.bg_color = (230, 230, 230)

        
        self.ship_limit = 3

        
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = 60, 60, 60
        self.bullets_allowed = 3 

        
        self.fleet_drop_speed = 10

        
        self.speedup_scale = 1.1
        
        self.score_scale = 1.5

        self.initialize_dynamic_settings()

    def initialize_dynamic_settings(self):
        """初始化随游戏进行而变化的设置"""
        self.ship_speed_factor = 1.5
        self.bullet_speed_factor = 3
        self.alien_speed_factor = 1 
 
        
        self.fleet_direction = 1 

        
        self.alien_points = 50 

    def increase_speed(self):
        """提高速度设置和外星人点数"""
        self.ship_speed_factor *= self.speedup_scale
        self.bullet_speed_factor *= self.speedup_scale
        self.alien_speed_factor *= self.speedup_scale

        self.alien_points = int(self.alien_points * self.score_scale)
        print(self.alien_points)
 